1.

no. of bricks required to make a room of height 4m breadth 2m and height 3m when brick is (25*10*5)cm each​

Answer»

Given :-

Dimensions of the room :

LENGTH = 4m

breadth = 2m

height = 3m

Dimensions of 1 BRICK : 25cm × 10cm × 5cm

To find :-

Number of bricks required to MAKE the room.

Let us convert meters to centimeters.

We know that, 1m = 100cm.

=> 4m = 400cm

=> 2m = 200cm

=> 3m = 300cm

Number of bricks required = \dfrac{Volume\: of \:room}{Volume\:of\: one\: brick}

Volume = Length × Breadth × Height

Therefore,

Volume of room = 400cm × 200cm × 300cm

Volume = 24000000cm³

Volume of 1 brick = 25cm × 10cm × 5cm

Volume 1 brick = 1250cm³

Hence number of bricks required = \dfrac{24000000}{1250}

Number of bricks required = 19200

Some more formulas :

Volume of cube = a³

Volume of cylinder = \pi r^{2}h

Volume of cone = \dfrac{1}{3} \pi r^{2} h

Volume of sphere = \dfrac{4}{3} \pi r^{3}

Volume of HEMISPHERE = \dfrac{2}{3}\pi r^{3}


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